Abstract
Tris(phosphine)borane ligated Fe(I) centers featuring N2H4, NH3, NH2, and OH ligands are described. Conversion of Fe-NH2 to Fe-NH3+ by the addition of acid, and subsequent reductive release of NH3 to generate Fe-N-2, is demonstrated. This sequence models the final steps of proposed Fe-mediated nitrogen fixation pathways. The five-coordinate trigonal bipyramidal complexes described are unusual in that they adopt S = 3/2 ground states and are prepared from a four-coordinate, S = 3/2 trigonal pyramidal precursor.
| Original language | English |
|---|---|
| Pages (from-to) | 534-537 |
| Number of pages | 4 |
| Journal | Journal of the American Chemical Society |
| Volume | 135 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 16 Jan 2013 |
Funding
This work was supported by the NIH (GM 070757) and the Gordon and Betty Moore Foundation, and through the NSF via a GRFP award to J.S.A. M.-E. M. acknowledges a Fellowship for Advanced Researchers from the Swiss National Science Foundation. Larry Henling and Dr. Jens Kaiser are thanked for their assistance with X-ray crystallography and Dr. Angelo DiBilio for his assistance with EPR measurements. We acknowledge the Gordon and Betty Moore Foundation, the Beckman Institute, and the Sanofi-Aventis BRP at Caltech for their generous support of the Molecular Observatory at Caltech. SSRL is operated for the DOE and supported by its Office of Biological and Environmental Research, and by the NIH, NIGMS (including P41GM103393), and the NCRR (P41RR001209).
Keywords
- IRON NITRIDO COMPLEX
- FEMO-COFACTOR
- NITROGENASE
- REACTIVITY
- COMPOUND
- CARBON
- BOND
- NI